The peak of most songs is at the 'phi point'. Here's how it goes in plain terms: you divide phi by phi + 1, which is about .618. Take a song you like, find the length in seconds, multiply that by .618, then convert back to minutes and seconds

Now fast forward to that moment in the song. Except for very unconventional music, such as some experimental music, some black metal, maybe some doom metal, the song usually either peaks or starts to peak thereabouts. It is a crazy accurate measure.

Most 'conventional' songs I have don't veer from the estimate by more than about ten seconds. I didn't have many misses, and most of them were with avant-garde music, like Ulver, I didn't suspect would pass anyway. Here are some of the best examples I could find.

Turisas - Battle Metal - 2:22, flute interlude leading up to epic battle speech, two seconds off of estimate

Amon Amarth - Annihilation of Hammerfest - 3:07, Hegg opens up the prayer to the Norse gods right after screaming "On the altar it lies, he lifts the hammer high, and before it he SWEEEEAAAAARRRRS" EXACTLY on time

I saw a BBC program about this same golden ratio applied to human facial beauty, where cranial and feature measurements were taken and analyzed as to conformity to this formula-ratio. The program is called "The Human Face," hosted by John Cleese, available on youtube in 6 parts, each about 8 minutes long.